Brake shoe



Mardi 2,6, 1940. o. RAsMussEN A BRAKE SHOE Filed OC. 18, 1939 f 9 f@ 2 Snnentor @hf fzsmwszz/ Qttornegs Patented MarrZB,v

` ,BRAKE snor;l Olaf Rasmussen, Dayton, Ohio, assigner to Gen- K eral Motors Corporation, Detroit, Mich.,a` corporation of Delaware ff l application october 18,1939, `2 olain'lsv-vl (o1. 18s- 250) i' l l This invention relates to brakes and more particularly to brake vshoes for frictionally engaging f l drums carried by` Vehiclewheels. l' j .Anl object of the invention is to modify' the` 5 conventional formof brake'shoe in a way kto pret y vent the squeaks whichar'e sometimes produced in use. l

Aing drawing inwhich: .j Y ,f Figure 1 is a view in elevation, partly vbroken away and in section' of the,iimproved'shoe- Figure 2 is a view ofthe shoe as seenv from the right side'of Figure 1. 1 u Figure 3 is a section'on line 3``-3 of Figure '1. 15 j 0n the drawing ythe brakeshoejis shown asofvl `T section having a webA anda angel, Vthe latter having a irictionfacin'g l9. e rThe web and flange may .beintegral asillustrated or may be Separately formed and'secured together by Weml-v n 1- 20 ing orotherwise. y ,v I

' The shoe should be considered as one of two similar shoes to be spreadapart into engagement with drum, not shown. IThes1oreading means is nota .part of theinve'ntion.' It maybe a cam 25 or an hydraulic motoroperating'betweenfand f uponone pair of adjacent shoe ends; y The shoes l may be 'anchored at the oppositepair of adjacent ends on a fixed abutment, not shown, there being provided `an articulating link `I I pivoted to the` I l 30 shoe at I3 and through which the thrustand re- .action vis transmitted. i It has .been found y M V produce a squeak when spread into 'contact with The invention is illustratedv in the accompanythat; such shoes sometimes serial N61 299,917

, the rotating drum. Toavoid the souealgslotsIli,"

in accordance with this invention, are cut lin the iiange, one onH each side of thewebland adjacent th'epoint of pivotal vconnection*between the web and link Il. There results some degree ,5

of flexibility in theipartsof the -iiangein the regionof the slots. It'vwill be observed that the rigidity of the shoe as a whole is not sacrificed by providingtl'sv exibility of.: the'two parts of the flange.` This will'be appreciated if it bev 1t) noted that'the linear'engaging contact between? f .the iiange and web is continuous throughoutthe'- arc of the shoe even in the region of the slots.

It has been yround that thepfiexibility so produced resultsfin a non-uniform Wearof the fric- 15 tion material and that itvserves toIprevent the squeaks. It does so` with no lessening 4oi.' the pressure transmitted betweenzthe flange and web even the region adjacent the slotsl I claim: Y y f 1. An arcuate brake shoe comprising a web and a ange arranged in right angular relation, there being continuous contactv between the web 4and iiang'e throughout the length. ofthe shoe arc,

said `flange having slotsone on each side of the` 2,5-

web, in parallel` relation with each other and n withsaidweb. f l 2. The invention defined by claim 1, ysaid shoe having an articulating linklpivoted vthereto and said slots 'being located' adjacent the Lpivotal 30 vconnection of the shoe and link.' .n 

